404. That’s an error.
The requested URL /add?source=atgs&feedurl=http%3A//blogrss.shinobi.jp/rss/ninja/inakmono/200 was not found on this server. That’s all we know.
/add?source=atgs&feedurl=http%3A//blogrss.shinobi.jp/rss/ninja/inakmono/200